Signal-cock.



- G. W. ,SHEBRURNB.

SIGNAL 0001:.

APPLICATION FILED SEPT. 25, 1908.

Patented Nov. 15, 1910.

2 SHEETS-SHBET 1.

G. W. SHBRBURNE,

- SIGNAL'GOGK.

APPLICATION FILED SEPT. 25, 1908.

Patented NW. 15, mm.

2 SHEETS-SHEET a a E s wwaa ' TED s'ra'lrls PATENT pens on.

CHARLES w.'sHERBU:eNn,-or nos'roN, riass'aorrusn'rrs.

. sienna-coca.

' Toallwhom it 'moy concern, Q

Be it known that I, CnAnLEs W. SHER- BU'RNE, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Im rovement in Signal-Cocksgofwhich the foll owin is a full, clear,land exact deseription, re erencebeing hadzto thc .accom panying dra wings' -formimg apart of this specification,--in explaining ts nature.

- Q. My invention relates to an improvement in s1 'al cocks and especially to a signal cock orai nbrake systems like that shown in .patentjissuedto Benjamin J. Graham May a, 1900,N0. 49,297,111 which; the cock is provided with an interior'mechanism or moving backward and it 1s desired to warn a.

person on thetrack this being accomplished valve worked by a handle or leverservin also as a whis .le so that the cock may be use( either for releasing air from the brake system for stopping a train or as a whistle or alarm when,.for example, a train of cars is by so operating the cock that compressed air from the brake system may ;be. liberated through the operating arm orhandle for soundm 'the whistle. Theo ject of my present-'nvention is to improve upon the constructio shown in the.

aforesaid patent by providing means whereby air from the brake system. may be liberated for blowing the whistle without the necessity for moving the handle or lever by which air is released from the brake system .for setting the brakes, If the turning of the same handle or lever is relied upon for accomplishing the release of sufiicient air from the brake system to blow the whistle, care must be exercised lest the handle or lever be turned too far and suchamount'of air be released from the brake system as to set the brakes.

' My invention relates also to various structural details all of which can best be seen and understood by reference to the drawings in which- Figute 1 shows the device in front elevation. lgig. 2'is a side elevation of the device. Fig. 31s a section on the line 33 of Fig. 2. Fig. 4 is asection on the line 44 of Fig. 1.

In the drawingsz-A represents the body of the cock connected to a pipeX which connects with" in forms a part of a brake system or other apparatus not shown. .The body A comprises a casting formed to provide an inlet passage a into which the air first enters from the pipe X. an interior Specification of Letters-Patent. Patentgd NOV 1 5u1910." Application filed September 25, 1902's. Serial No. 454.721.

valve chamber a Wllwfl connects witht'the inlet passage a -and an dutlet'passage a which proceeds from the valve chamber.

011 the side, of the body of the valve is pref valve chamber a is a plug valve B. This is es" held in place to be turned within the valve chamber by a-nut b and washer 1) arranged upon the contracted end of the-valve extend ing outside the valve chamber-and beat-mg against the side of the body of the-;cock.-'- Attached to and projecting angularly from the forward end or head. of the valve B out 11 side the valve chamber ais abracketfb". into, the end of which screws a. whistle C."

This whistle forms=the lever or' handle by 'lii which the valve is turned in the valve chainber.. Extending crosswise throl'lgh thebody of the valve is a passage-b which'wlientho" valve has been turned to anopen position.

'- is in communication with both" the" inlet "'8o:

passage a of thecock audits-outlet passage a by which air entering the passage 'aflmay pass throughthe valve and escape throu'g the outlet passage. Upo'nturningthe valve to a reverse or closed positionthe air will be entirely cut ofi. It may be determined when the valvehas been turned to a-proper-open position by means of the lugs a projecting from the side of the body of the cock.

These lugs are arranged whereby either one or the other of them 'will be struck by the: bracket 7) projecting from the end oft-he valvewhen the valve has been turned by the handle or lever to a closed position, the relative disposition of the lugs,-in other words, 5

being such that the engagement between the bracket and lugs will occur when'the valve has been turned sufficiently to insure "a; proper opening of ii thclugs defining'such.

position depending upon the direction in which the valve is turned.

W ith respect now to the means employed for blowing and regulating the operation 'of the whistle: Threadedinto the'head ofthe valve B is a chambered plug I). The chainber of this plug forms a portion of the chain of connecting passages by which air may pass from the inlet passage a of the cock to the whistle for blowing it. This chain of connecting passages comprises first the no small lay-passage 6 extending from the inlet passage a of the cock through the valve to communicate with the cross passage 2) through it. The by-passage I) through the valve is preferably arranged to extend ina direction approximately at right angles to the passage If through the valve so that when the valve is in a closed position the by passage b will be in constant communication with the inlet passage and air may on ter the passage 1). In this connection it should be observed that when'the valve is closed the passage 6 forms with thevalve bracket If. The passage 1) communicateswith a chamber b formed below the whistle from whence the air may strike against and sound the whistle by way of a series of passages Z).

Arranged i1 1 the forward end of the chamber of the plug b to slide therein is what may be termed a sliding piston'b having a push button b arranged upon the end thereof. Projecting from the end of the piston b and extending through the chamber of the plug and out through the passage '6 in the end thereof is'a rod (1. ()u this rod outside the end of the plug 7f is an auxiliary valve btwhii-h is adapted to close for aseat. against the end of the plug around the passage I)? through it, closing said passage. The auxiliary valve is held in :1 normally closed position by means of a spring Z2" arranged upon the rod I and ii'iterposed between the end of the sliding piston I) and the inside end of the plug. The auxiliary plug being accordingly held in a normally closed position, air cannot normally pass to the whistle. A Byp'ressing upon the button 1 however, the piston I) will be advanced overcoming the spring bearing against it and the valve 1) will be forced from its valve seat when the air from the inlet passage a may have clear conununication to the whistle for sounding it. In other words, the whistle can be sounded at any time the operator may desire simply by pressing upon the button I). It is-also to be observed that the whistle maybe sounded when the valve is-either in a closed or an open position. As said before, the disposition of the by-passage 6 is such as to remain in communication with the inlet passage aas long as the valve remains in a closed position and when the valve has been turned to an open position then the air will have direct access to the passage b. when. though the main portion of the air will escape by way of the outlet passage a, a sutiicient amount of air may pass to the whistle for blowing it should one desire to blow the whistle. at this time.

Having thus fully described my invention. I claim and desire to secure by Letters Patent of the-United States 1. In a cock of th e character specified, the combination of a body having inlet and outlet passages and a valve chamber between said passages, a main valve operable within said valve chamber, a whistle, said main valve having a cross passage through it tornung a connection lJGlWQQIiSfild inlet and outlet passages when said valve is open, said main valve having also a by-passage extending from said inlet passage to said cross passage when said main valve is in'a closed position and a further passage extending from said cross passage and connecting with said whistle, an auxihary valve, for controlling the aforesaid passage connecting withsaid whistle, and means for controlling said auxiliary valve whereby it may. assume a. normally closed position or be opened as occasion may require. I

2. In a cock of. he. character specified, the combination of a body having inlet and outlet passages and a valve chamber interposed between said passages, a .valve' having a assage extending through it and arrange to connect said inlet and outlet passages-when said valve is in an open p'ositiomsaid valve also having a by-passage through it by which air from the inlet passagemay be directed into the interior of the valve when the valve is in a closed position, a whistle connecting with the head of said valve and serving as a handle for operating it, said whistle being in communication with the interior of said valve by which air let into the same may be directed to said whistle, a chambered plug fitting into the head of said valveand connecting with the interior thereof, the chamber of said plug forming a part or portion of the connection for directing air from the interior of said valve to said whistle, a piston arranged to slide within the chamber of said plug and be manually .controlled to slide from outside the same, a rod carried by said piston and extending through the chamber of the-plug and through the end thereof, an auxiliary valve arranged upon said rod and adapted to close against the end of said plug for a valve seat for controlling the passage through the same, and means for holding said auxiliary valve in a normally closedposition controlled by said sliding piston.

CHARLES W. SHERBUBNE.

Witnesses:

FRED. W. W-HITELEY, RICHARD M. TOPHAM.

my... n".- .4. 4 PM 

